Heimdall

Heimdall is an Asgardian blessed with sensory capabilities far beyond those of other Asgardians, and these senses have been put to use placing Heimdall in the role of gatekeeper to Asgard at his observatory on the Bifrost Bridge. Heimdall is a strong and loyal warrior, with an acute sense of honor. Although being extremely powerful, even for an Asgardian, he loyally serves Odin, having sworn an oath of faith to his king.

Strength

• Breaks out of the ice he was frozen in and kills two frost giants (source)
• Stabbed through the hull of a Dark Elf ship with a knife (source)
• One-shot an undead soldier (source)
• Cuts through Hela’s undead minions (source)
• Killed two Undead soldiers with one swipe (source)

Speed

• Dodged a piece of a car that he accidentally teleported (source)
• Caught up to a Dark Elf ship while on foot (source)

Durability

• Gets frozen by Loki and survives long enough to break out though a little worse for wear (source) (https://www.reddit.com/r/RTvideos/comments/ixelhe/heimdall_hears_thor_from_asgard/?utm_source=share&utm_medium=ios_app&utm_name=iossmf)
• Keeps fighting after his leg is slashed (source)

Skill

• Killed two Frost Giants despite them being weakened after he was frozen (source)
• Took down an enemy Dark Elf ship with only two knives (source)
• Easily dispatches Hela’s undead minions (source)
• Even when his leg is slashed at he takes down two undead soldiers before he’s taken by surprise by a third one (source)

Senses

• Hears Thor from Earth-realm while he was on Asgard (source)
• Saw Jane searching for Thor on Earth from the Rainbow Bridge (source)
• Hears Thor calling for him from Vanaheim (source)
• Saw a Dark Elf ship despite it being cloaked though he only saw them once they made into Asgard (source)
• Hears Sif calling for him from Earth (source)
• Sees Thor while he’s on Sakaar (source)
• After Loki’s surprise rescue he tells the trickster that he still saw him coming (source) (https://gfycat.com/thickrightgreatwhiteshark)

Bifrost

• Sends Thor, Sif and The Warriors Three to Jotunheim (source)
• Sends Odin to Jotunheim (source)
• Opens the Bifröst for Sif and The Warriors Three sending them to Earth (source)
• Sends Thor to Vanaheim (source)
• Brings Thor out of Vanaheim (source)
• Brings Thor and company back to Asgard (source)
• Brings Jane and Thor to Asgard (source)
• Brings The Warriors Three and some Asgardian soldiers back to Asgard (source)
• Sends Thor to Janes apartment (source)
• Sends Sif to Earth (source)
• Teleports Sif off of Earth (source)
• Takes Thor away from the Avengers headquarters (source)
• Sends Hulk away from Thanos, sending him back to Earth (source) (https://gfycat.com/sneakysimilarafricanelephant)

Other

• Be warned, I will honor my sworn oath to protect this realm as its gatekeeper. If your return threatens the safety of Asgard, Bifrost will remain closed and you will be left to die on the cold waste of Jotunheim. (source)
• By putting his sword in its scabbard he raises Asgard’s defenses (source)
• Gives Thor his sight allowing them to see each other (source)
• According to Coulson Asgardians heal faster than humans (source)
• Is one of the few to survive Thanos’s initial attack though only barely (source)